Story · arXiv
Aborted but Not Forgotten: KV-Cache Retention Breaks Rollback Consistency in Language Agents (arXiv)
paper · Story page
A paper shows that clearing an aborted branch from an agent's transcript may not clear it from the model when the serving layer keeps the branch's KV cache.
In plain words
- A study found that rejected text can still influence an artificial intelligence system after disappearing from its visible history.
- The serving software may keep hidden records of earlier text, so the system continues considering material the application discarded.
- Researchers compared identical final text with either stale hidden records or records rebuilt from the accepted history.
- Rebuilding those records from the accepted history removed the unwanted influence in every tested case.
- Developers must clear hidden serving records as well as visible history when undoing an artificial intelligence system's work.
Appeared in
- Aborted agent branches live on in the KV cache, plus StateM's harness scaling
Aug 19, 2026 · lead story
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